[EVPN VXLAN] WHen LIF is moving to new VN control node is not sending evpn route

[chhandak]

Description:
WHen LIF is moving to new VN control node is not sending evpn route

Details:
Lif was initially part of vn-test1. When moving the VN to vn-test2, QFX is subscribing for new VN route target. But CN is not sending any evpn route to QFX.

Workaround:
If we clear the BGP neighbor all routes are send my CN correctly

root@5b11-qfx2> show route table bgp.rtarget.0 advertising-protocol bgp 172.16.180.101

bgp.rtarget.0: 8 destinations, 15 routes (8 active, 0 holddown, 0 hidden)
  Prefix Nexthop MED Lclpref AS path
  0:0:0/0
* Self 100 I
  65000:65000:1/96
* Self 100 I
  65000:65000:8000002/96
* Self 100 I
  65000:65000:8000003/96 >>>>>>>>>>>>>>>>>>>>>New VN Rt
*
  65000:65000:268435460/96
* Self 100 I
  65000:65000:268435461/96
* Self 100 I
  65000:#0602020100000506/96
* Self 100 I

root@5b11-qfx2# run show route table default-switch.evpn.0 | grep 3:
3:172.16.2.1:1::4::172.16.2.1/248 IM
3:172.16.3.1:1::4::172.16.3.1/248 IM
3:172.16.180.102:2::4::172.16.180.102/248 IM
3:172.16.180.103:2::4::172.16.180.103/248 IM

[Nischal Sheth (nsheth)]

As discussed offline, this is due to the 0:0:0/0 prefix in bgp.rtarget.0
advertised by QFX. Will mark the bug as Invalid.